GRASS GIS 7 Programmer's Manual
7.9.dev(2021)-e5379bbd7
c_reclass.c
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/*!
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\file cluster/c_reclass.c
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\brief Cluster library - Reclass data
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(C) 2001-2009 by the GRASS Development Team
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This program is free software under the GNU General Public License
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(>=v2). Read the file COPYING that comes with GRASS for details.
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\author Original author CERL
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*/
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#include <
grass/cluster.h
>
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/*!
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\brief Reclass data
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\param C pointer to Cluster structure
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\param minsize minimum class size
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\return 0 on success
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\return 1 no change
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*/
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int
I_cluster_reclass
(
struct
Cluster
*C,
int
minsize)
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{
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int
band, c, hole, move, p;
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for
(c = 0; c < C->
nclasses
; c++)
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C->
reclass
[c] = c;
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/* find first `empty' class */
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for (hole = 0; hole < C->
nclasses
; hole++)
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if
(C->
count
[hole] < minsize)
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break
;
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/* if none, just return */
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if
(hole >= C->
nclasses
)
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return
1;
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for
(move = hole; move < C->
nclasses
; move++)
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if
(C->
count
[move] >= minsize) {
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C->
reclass
[move] = hole;
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C->
count
[hole] = C->
count
[move];
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for
(band = 0; band < C->
nbands
; band++)
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C->
sum
[band][hole] = C->
sum
[band][move];
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hole++;
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}
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else
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C->
reclass
[move] = -1;
/* eliminate this class */
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for
(p = 0; p < C->
npoints
; p++)
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C->
class
[p] = C->
reclass
[C->
class
[p]];
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C->
nclasses
= hole;
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return
0;
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}
Cluster::nbands
int nbands
Definition:
cluster.h:9
Cluster::sum
double ** sum
Definition:
cluster.h:21
Cluster::nclasses
int nclasses
Definition:
cluster.h:27
Cluster
Definition:
cluster.h:7
Cluster::npoints
int npoints
Definition:
cluster.h:10
Cluster::count
int * count
Definition:
cluster.h:19
Cluster::class
int * class
Definition:
cluster.h:17
Cluster::reclass
int * reclass
Definition:
cluster.h:18
I_cluster_reclass
int I_cluster_reclass(struct Cluster *C, int minsize)
Reclass data.
Definition:
c_reclass.c:25
cluster.h
lib
cluster
c_reclass.c
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